diff options
Diffstat (limited to 'dhcpcd/dhcpcd-hooks/29-lookup-hostname')
| -rw-r--r-- | dhcpcd/dhcpcd-hooks/29-lookup-hostname | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/dhcpcd/dhcpcd-hooks/29-lookup-hostname b/dhcpcd/dhcpcd-hooks/29-lookup-hostname new file mode 100644 index 00000000..8661fccd --- /dev/null +++ b/dhcpcd/dhcpcd-hooks/29-lookup-hostname @@ -0,0 +1,34 @@ +# Lookup the hostname in DNS if not set + +lookup_hostname() +{ + [ -z "$new_ip_address" ] && return 1 + local h= + # Silly ISC programs love to send error text to stdout + if type dig >/dev/null 2>&1; then + h=$(dig +short -x $new_ip_address) + if [ $? = 0 ]; then + echo "$h" | sed 's/\.$//' + return 0 + fi + elif type host >/dev/null 2>&1; then + h=$(host $new_ip_address) + if [ $? = 0 ]; then + echo "$h" \ + | sed 's/.* domain name pointer \(.*\)./\1/' + return 0 + fi + fi + return 1 +} + +set_hostname() +{ + if [ -z "$new_host_name" -a -z "$new_fqdn_name" ]; then + export new_host_name="$(lookup_hostname)" + fi +} + +if $if_up; then + set_hostname +fi |